Unbind redundant health codes, but still can't create new health codes. What's wrong?

If this electronic health card cannot be added, it means that it has been bound many times, that is to say, it has been bound, for example, a mobile phone number.

Residents apply for electronic health codes through online platforms or paper health codes through communities, and obtain qualifications such as traveling and returning to work. Government departments, employers, communities, etc. Comprehensively judge the personal health risk level and realize the dynamic health certification in a special period.